Details
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Task
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Status: Resolved
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Major
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Resolution: Fixed
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1.5.0
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None
Description
Ambari UI calculates ram-per-container as a fraction.
YARN scheduler's minimum memory is Math.round(ram-per-container), while the maximum memory is Math.round(number-of-containers * ram-percontainer).
The problem is that for some fractional values, 3*Math.round(fraction) > Math.round(3*fraction). (Ex: Take value 1.7). Because of that less number of containers can actually be started, as the value slightly goes over the maximum.